Hand warmer



FIG. 1 is a front elevational view of a hand warmer showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top, rear and left side perspective view thereof; and,

FIG. 8 is a top, front and right side perspective view thereof.

The broken lines in the drawings illustrate portions of the hand warmer which form no part of the claimed design. 

CLAIM The ornamental design for a hand warmer, as shown and described. 